Shelterin promotes tethering of late replication origins to telomeres for replication-timing control

Shiho Ogawa, Sayuri Kido, Tetsuya Handa, Hidesato Ogawa, Haruhiko Asakawa, Tatsuro S. Takahashi, Takuro Nakagawa, Yasushi Hiraoka, Hisao Masukata

研究成果: Contribution to journalArticle査読

8 被引用数 (Scopus)


DNA replication initiates at many discrete loci on eukaryotic chromosomes, and individual replication origins are regulated under a spatiotemporal program. However, the underlying mechanisms of this regulation remain largely unknown. In the fission yeast Schizosaccharomyces pombe, the telomere-binding protein Taz1, ortholog of human TRF1/TRF2, regulates a subset of late replication origins by binding to the telomere-like sequence near the origins. Here, we showed using a lacO/LacI-GFP system that Taz1-dependent late origins were predominantly localized at the nuclear periphery throughout interphase, and were localized adjacent to the telomeres in the G1/S phase. The peripheral localization that depended on the nuclear membrane protein Bqt4 was not necessary for telomeric association and replication-timing control of the replication origins. Interestingly, the shelterin components Rap1 and Poz1 were required for replication-timing control and telomeric association of Taz1-dependent late origins, and this requirement was bypassed by a minishelterin Tpz1-Taz1 fusion protein. Our results suggest that Taz1 suppresses replication initiation through shelterin-mediated telomeric association of the origins at the onset of S phase.

ジャーナルEMBO Journal
出版ステータス出版済み - 8 1 2018

All Science Journal Classification (ASJC) codes

  • 神経科学(全般)
  • 分子生物学
  • 生化学、遺伝学、分子生物学(全般)
  • 免疫学および微生物学(全般)


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